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bar magnet 磁棒,條形磁鐵。

bar mitzvah

Mere giant magnetoresistance , which debuted in commercial hard drives back in 1998 , represented the first example of so - called spintronics , or electronics based not on charge but spin , the property of an electron that makes it act like a tiny bar magnet 不過僅有在1998年的商業化硬盤上首度亮相的巨磁電阻效應才是稱之為自旋電子- -或非基于電荷而是旋轉(電子的這個特性使它像一個小型的條形磁鐵)的電子- - - -的首個例子。

This effect occurs because the magnetism in the material is generated by innumerable magnetic atoms , like a host of tiny bar magnets , all roughly aligned but randomly fluctuating like compass needles being jiggled about 這是因為材料的磁性是由無數個磁性原子所產生的,就像一群微小的塊狀磁鐵,它們雖大致排齊但仍不規則,就像羅盤的指針一樣不停晃動。

We only observe the small portion of the magnetic field that extends to the surface and beyond , where its basic structure is a dipole that is , a simple north south field like that of a simple bar magnet 我們僅僅觀察到擴展到地表和地表以外的磁場的一小部分,在這里它的基本結構是一個偶極子,就像一個簡單的棒磁鐵一樣是一個簡單的南北極磁場。

Birds and compasses know north from south because , like a giant bar magnet , the earth ' s magnetic field has two poles that line up closely with the planet ' s axis of rotation 候鳥與指北針都知道何為北方、何為南方,因為地球就像一條巨型磁鐵棒,它的磁場有兩極,且這兩個地磁的磁場線和地球的自轉軸非常接近。

A several of rubber bar magnet for dc micro - motor is discussed in this paper . and engineering tests is introduced which are needed in production of rubber bar magnets and micro - motors 摘要論述微型直流電動機中使用的橡塑磁條的特性,以及在磁條生產廠和電機制造過程需要進行的工程檢驗。

Because the core current is somewhat symmetrical around the axis of rotation , the associated magnetic field is similar to that of a bar magnet 因為地核流在旋轉軸周圍存在著一些對稱,所以相關的磁場與棒磁鐵的磁場相似。

That shape , something like an apple sliced downward through its core , would be constant for a bar magnet 形狀像蘋果的向下穿過它的果核的心形薄切片,對條形磁鐵來說磁線是恒定不變的。

To test the idea , one group of ten pigeons had strong little bar magnets attached to their backs 為驗證這一看法,一組為十只的鴿子背上縛上了強力小磁棒。

The form of the stable geomagnetic field is like that of a bar magnet at the center of the earth 穩定地磁場的形狀與地球中心的棒磁鐵的形狀相似。

If the bar magnet is simply held stationary near the coil, no current is indicated . 如果磁棒單純靜止在線圈附近,就檢測不到電流。

The magnetic state of a bar magnet or a horseshoe magnet is extremely complicated . 條形磁鐵或馬蹄形磁鐵的磁態是極其復雜的。